DC Power Alternator died
Token Redneck
Joined: Jun 2007
Posts: 9,339
Likes: 349
From: Breckenridge, TX
Tell that to my dead 140A OEM unit. Voltages in the 10s during winter cold starts even when it was in good shape isn't enough.
Former Vendor
Joined: Feb 2010
Posts: 1,803
Likes: 5
They are rock rock solid units.
New User
Joined: Jan 2016
Posts: 16
Likes: 0
From: lake of the pines texas
I went with the l n with an installed smaller pulley last year and have been very happy. I spent over 34 years in fire service and most of our equipment had ln's installed and I only observed 1 replacement of the unit and that might have been a mechanic throwing parts. I also added the upgraded wiring
Posting Guru
Joined: Jul 2006
Posts: 1,181
Likes: 1
From: Fairfield, CA
I'll throw in my 2 cents. I'm on my second DC unit and after reading the instructions that came with it, I have a clear understanding of what to expect from any alternator:
They are not designed to charge low\dead\abused batteries. They are designed to maintain a set of HEALTHY batteries. That is all.
They are not designed to charge low\dead\abused batteries. They are designed to maintain a set of HEALTHY batteries. That is all.
Hotshot
Joined: Dec 2014
Posts: 17,830
Likes: 3,115
From: Jersey Shore
Technically, they are there to provide electrical power for electrical components and replenish the batteries from normal starting events, a short term event. Glad you're on board that you shouldn't use them for a full recharge of depleted batteries after reading the instructions, but the biggest take-a-way for me is you're on your second DC alternator. Is that because of the aforementioned warning and new understanding, or that well, darn it, it just went bad? 
(saying this with a nudge to the ribs ....)
(saying this with a nudge to the ribs ....)
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Hotshot
Joined: Dec 2014
Posts: 17,830
Likes: 3,115
From: Jersey Shore
I went with the l n with an installed smaller pulley last year and have been very happy. I spent over 34 years in fire service and most of our equipment had ln's installed and I only observed 1 replacement of the unit and that might have been a mechanic throwing parts. I also added the upgraded wiring
Posting Guru
Joined: Jul 2006
Posts: 1,181
Likes: 1
From: Fairfield, CA
Technically, they are there to provide electrical power for electrical components and replenish the batteries from normal starting events, a short term event. Glad you're on board that you shouldn't use them for a full recharge of depleted batteries after reading the instructions, but the biggest take-a-way for me is you're on your second DC alternator. Is that because of the aforementioned warning and new understanding, or that well, darn it, it just went bad?
Laughing Gas
Joined: Jan 2005
Posts: 1,142
Likes: 25
I have 5 million miles over the road miles in class 8 trucks, 90+% of which had Leece Neville alternators and had only 1 have an issue when the charge wire chaffed and connected to ground and melted the output terminal, the shop just replaced the terminal and it worked for at least another 100K , then I traded the truck on a new one.
Hotshot
Joined: Dec 2014
Posts: 17,830
Likes: 3,115
From: Jersey Shore
When just started or after a good run? Are you using the stock size pulley or the smaller one?
Hotshot
Joined: Dec 2014
Posts: 17,830
Likes: 3,115
From: Jersey Shore
I have 5 million miles over the road miles in class 8 trucks, 90+% of which had Leece Neville alternators and had only 1 have an issue when the charge wire chaffed and connected to ground and melted the output terminal, the shop just replaced the terminal and it worked for at least another 100K , then I traded the truck on a new one.
Thread Starter
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More Turbo
Joined: Jan 2011
Posts: 699
Likes: 20
Running smaller pulley. The one off the D.C. Power didn't fit right so I had to order. I replaced tensioner and belt too. I get 12 at startup on scanguage while glowplugs are on. After that I'm seeing 13.9.